Hacksaw blade mounting



Sept. 3, 1940. Q'HUBEQK 2,213,841

HACKSAW BLAD E MOUNTING Filed July 14, 1938 WK. 4 2 e3 61 /4 INVENTOR67/4,? E5 HUBE'CIF ATTORNEY Patented Sept. 3, 1940 EJNETE OEQE 6 Claims.

This invention relates to what are commonly referred to as hacksaws andparticularly to devices of this kind employing means for detachablysupporting blades of different kinds and lengths in connectiontherewith; and the object of the invention is to provide an improveddevice or pair of devices adapted for mounting in hacksaws of the typeand kind under consideration as now constructed so as to provideasimplified means for adjusting the blade into different positions withrespect to the supporting frame or mounting to adapt the tool todifferent uses and more particularly to the provision of a device of thekind described which might be regarded as a replacement part for otherdevices of this kind which do not employ the simplified features hereinset forth; a further object of the invention being to provide a deviceof the character described wherein adjustments of the blade may be madewithout removing the blade supporting devices proper from the supportingframe and whereby such adjustments may be quickly and easilyaccomplished; and with these and other objects in view, the inventionconsists in a device of the class and for the purpose specified which issimple in construction, efiicient in use, and which is constructed asmore fully hereinafter described and claimed.

The invention is fully disclosed in the following specification, ofwhich the accompanying drawing forms a part, in which the separate partsof my improvement are designated by suitable reference characters ineach of the views, and in which:

Fig. 1 is a side and sectional View showing one form of my improvedblade mounting in connection with one standard type of frame.

Fig. 1a is a side view illustrating the form of my invention shown inFig. 1 in connection with another standard type of hacksaw frame.

Fig. 2 is an enlarged sectional view on the line 2-2 of Fig. 1.

Fig. 3 is a section on the line 3-3 of Fig. 1, omitting part of theconstruction.

Fig. 4 is a view similar to Fig. 1, showing a modified form of deviceand omitting part of the construction.

Fig. 5 is a sectional detail view of another form 50 of constructionwhich I employ; and,

Fig. 6 is a side and sectional view of another form of construction.

In Fig. 1 of the drawing, I have shown for the purpose of illustratingone method of carrying my invention into effect, a hacksaw frame i0consisting of two angular end portions II and i2; these end portionshaving conventional means it for detachably coupling the crossheadportions thereof in adjusting the frame to accommodate blades I l ofdifferent lengths. The 5 L-shaped parts it and E2 of the frame usuallyterminate at their ends in angular bearing portions or sockets it, it,respectively; and while there are many types and kinds of hacksawframes, there are two conventional types which are extensively used. Onetype includes a handle portion H, such as shown in Fig. 1 of thedrawing, which extends outwardly from one end of the frame Hi. There areother commonly used so-called pistol grip frames. The grip end portionof one of these frames is shown in Fig. la of the drawing. The frameproper lUa is substantially the same as the frame it of Fig. 1, but isprovided between one angular end portion i la. and the crosshead 33athereof with a grip 20 portion l3 secured thereto by suitable means, as

by rivets 119.

At this time it is well to state that it is one of the features of myinvention to provide a blade coupling and adjusting part or device whichis 25 universally adaptable to the standard types of frames which are incommon use so that this device may be sold as a replacement part orparts to be substituted for the conventional blade supporting meanscommonly employed. The common blade supporting means which are in use,however, require intricate adjustments or necessitate the entire removalof the blade supporting part in order to change the angularity of theblade in the frame; whereasmy 35 improved device will accomplish thedesired result without removing the blade supporting device from theframe, and in fact, without removing any of' the parts of the completeassemblage.

In Figs. 1, 2 and 3 of the drawing, the device consists of a main device2% and an auxiliary part M of such device. The device 23 comprises anelongated tube or sleeve 22, the end portion 23 of which is square incross-sectional form to seat in the square bearing it as will appear ona consideration of Fig. 3. It will be understoodthat in this figure partof the structure of the handle ll has been removed for the purpose ofclearly illustrating the bearing l5 as described. The squared end 23terminates on its outer end in an enlarged head 24 which limits outwardmovement of the device 28 with respect to the bearing It. The other endportion of the tube 22 is threaded as seen at 25 so as to engage theusual threaded ferrule Ha constituting part of the handle ll as in theusual construction. In other words, the thread 25 will be standard tomeet the standard construction of such handles when the device isintended for sale as a replacement or substitute part.

Slidably mounted inthe tube 22 is a pin or rod 26 having an enlargedportion 2? adjacent the inner end thereof fitting in an enlarged portionin the bore of the tube so as to operate upon a spring 28, the springnormally urging the pin 26 inwardly. The inner end of the pin isprovided with a coupling head 29 which is in the form of a cylinderwhich is cut away to the center thereof as seen at 38 forming a bladereceiving socket. This socket is bounded on one wall by an inwardlyprotruding hook 3! which forms a means for retaining the blade idagainst accidental displacement when the parts of the deviceare'loosened for the adjustment of the blade. The head 29 is providedwith a pin 32 which extends into the socket 3% so as to engage anaperture I la. in the end of the blade Hi. With this type ofconstruction, it will be understood that the blade it will requireslight fiexure for attaching and detaching the same with the couplinghead 29. In the construction shown in Figs 1 to 3 inclusive, the outerend .of the pin, is threaded as seen at 33. Mounted on this threaded endis a ratchet sleeve 36 which is also preferably keyed to the pin or rod26 by a transverse pin 35.. The ratchet 3% is also externally threadedto correspond with the threads of the tube 22 so that the entire deviceis free to enter the ferrule Ila.

The inner surface of the ratchet 34 is provided with circumferentiallyspaced teeth adapted to register with corresponding teeth formed in theouter end of the tube 22 as indicated at 36 so that the pin Ed is freeto be rotated in one direction but will be retained against rotation inthe opposite direction. The other part 2! of the complete device is inthe form of a round pin 3i which fits freely in the bearing or socket l6and is provided at its outer end with a head 38 seating upon the bearingto limit inward movement of the pin. The pin 3? has a coupling portion39 which corresponds to the coupling head 28 in every respect so as tomount the other end of the blade M. The head 38 may also be provided onthe inner surface thereof with circumferentialy spaced beveled teeth 38awhich will aid in retaining the pin 3? in different positions ofadjustment while the blade is under tension and which will permit freerotation of the pin in the adjustment of the blade when the tension onthe blade is relieved.

In the use of the device described, it will be understood that thehandle ll operates to support the blade it under tension within theframe; the ferrule Ila drawing the device Bil outwardly in accomplishingthis result in the operation of tightening the handle. However, when itis desirable to adjust the blade into different positions or to remove ablade and substitute a new or other type and kind of blade, the handleii is loosened by screwing the same outwardly. This operation willpermit inward movement of the device 2% thus loosening the blade It; andwhen so loosened adjustment may be provided by simply rotating thecoupling 29 to bring the blade in the desired position. In this rotarymovement, the ratchet sleeve 3d will simply snap over the teeth on thetube 22 until the blade is in proper position, the Spacing of the teethbeing such as to provide any desired angularity of the blade, fourdiffer ent positions being illustrated in the accompanying drawing.However, any number of positions may be provided. After the desiredadjustment of the blade has been made or after a new blade has bensubstituted, the handle ll may be again rotated so as to tighten theblade in the usual manner. It will be understood that no rotary movementis transmitted to the coupling 29 in this operation, and no rotarymovement is transmitted to the tube 22 but this tube will move outwarlyin the bearing it. In the above adjustment of the blade, it will beunderstood-that the associated part 2! will be correspondingly rotated,the handle being sufficiently loosened to compensate for the movement ofthe parts.

In Fig. 1a a pistol grip frame has been shown as provided in the socketi511, thereof with the same adjusting device 2% as is shown in Fig. 1.In Fig. 1a., however, a suitable nut ilia is employed in place of theferrule ll'a of the handle ll shown in Fig. 1 as the means fortightening the device 26 together with the blade it in the frame. Thenut 49a is preferably of knurled type, but may be of the wing-nut orother suitable type in accordance with conventional practices. Theoperation of the device as applied to the pistol grip frame is exactlythe same as previously described in connection with Figs. 1 to 3.

The device as disclosed in Figs. 4 to 6 inclusive is adapted for use inconnection with a hacksaw of the pistol grip type. With this-type ofconstruction, the blade Ml or the coupling 29 may be rotated when thenut 40 is loosened or the ratchet 3% may be rotated by hand engagementto adjust the blade. However, it is preferred that a supplemental nutsuch as shown at M in Fig. 5 of the drawing be employed in such cases;this nut being attachable and detachable with respect to the ratchet 3%.An inturnedflange Ma is provided on the nut to limit inward movementthereof.

In this connection another adaptation of the device primarily for use inthe pistol grip type of frame is shown in Fig. 6 of the drawing, whereinan operating knob Z2 is disclosed which consists of an enlarged knurledhead 63 and a sleeve portion i l having ratchet teeth t5 similar to theteeth employed on the sleeve 3@. In other words, with this construction,two parts will be formed integrally and the outer end of the pin 26awhich is otherwise similar to the pin 255 will be unthreaded. The knob22 will be either, driven onto the pin 26a or secured thereto by a setscrew indicated at at. In the structure shown in Fig. 6, the nut 40 isalso illustrated as arranged upon the threaded portion of the tube 22;the latter being identical with the structure shown in the otherfigures.

In Fig. i of the drawing, the device is shown on an enlarged scale withthe tube 22 in elevation. The device in this construction differs fromthat shown in Figs. 1 to '3 inclusive simply in substituting for theexternally threaded ratchet 34, a ratchet 34a having a plain or angularend 34?), which would form a finger piece facilitating rotation of theblade. It will be understood, however, that in any case the blade itselfor the coupling 29 may be directly rotated. With this type ofconstruction and by virtue of the reduced size of the ratchet 34, thesame is free to pass into the handle I? without engaging the threads ofthe ferrule Ha. At the same time attachment and detachment of the nut 40will be permitted without the need of uncoupling the ratchet 34a fromthe pin 26.

All of the forms shown will be adaptable for use in conjunction withtools of the standard or conventional constructions with the exceptionof the structure shown in Fig. 5, which is adapted primarily for thepistol grip type of tool. It will be understood in this connection thatthe structure of Fg. while being adapted for the pistol grip tool canalso be used in the other types of tools by simply removing the nut M.In this structure, it is also to be noted that a plain pin 26:: such asshown in Fig. 6 is also used, and the ratchet 3 2 is secured to the pinby a transverse key pin 35a similar to the pin 35.

It will be understood that while certain embodiments of my invention areillustrated in the accompanying drawing, other changes in the specificform of the respective parts of the device may be made, especially inadapting the same to special. types 01 hacksaw frames. However, in therespective uses of the device, it is my intention to provide a toolmounting means for any type or kind of frame which will permit of theadjustment or replacement of the tool without detaching the toolengaging means from the frame and also in providing a quick and simplemeans for performing the desired function.

It will be understood that in the movement of the blade into tautposition, the tightening of the ferrule ll or the nut 48 operates todraw the sleeve 22 outwardly in the bearing or socket l5. In thisoutward movement, the'outer ratchet end of the sleeve engages theratchet on the pin and thus operates to draw the pin including thecouplin head 29 thereof outwardly. When the blade is in its taut orclamped position, the ratchet prevents rotary movement of the pin andthe coupling 29. It will be apparent that the setting of the ratchetwill maintain the proper alinement of the blade in the frame with theteeth of the blade extending in the proper direction. In this manner, itwill also be noted that in loosening the device for adjustment andotherwise, it is only sufilclent to provide for the free movement of theratchet to rotate the pin carrying the coupling 29, and of coursesumcient to permit rotation of the pin 37.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent. is:

1. An attachment for a conventional hacksaw frame providing for theadjustment and replacem nt of a blade without removing the attachmeritfrom said frame, said attachment comprising an elongated threadedsleeve, predetermined external wall portions of said sleeve beingflattened for keying the same in one part of said frame to permitlongitudinal movement only of the sleeve therein, threaded means on saidsleeve operatlvely bearing against said frame for controlling thelongitudinal movement of said sleeve, a blade coupling element rotatableand longitudinally movable in the sleeve, a coupling memher at one endof said element for attaching one end of a blade therewith, ratchetmeans at the other end of said element engaging corresponding ratchetmeans on said sleeve, a spring holding the ratchet means on said elementand sleeve in resilient engagement, the shape of said ratchet meansbeing such that said spring in conjunction with said ratchet meansprevents rotary movement of said element in one direction whilepermitting rotary movement thereof in the other direction when saidthreaded means has been moved to a position out of engagement with saidframe.

2. An attachment for hacksaw blade frames providing adjustment andreplacement of a blade without removing the attachment from the frame,said attachment comprising an elongated threaded sleeve, means forkeying the sleeve in one part of the frame to permit longitudinalmovement only of the sleeve therein, movable threaded means on saidsleeve having a shoulder thereon adapted to bear against said part ofthe frame, a blade coupling element supported in said sleeve forlongitudinal and rotary movement with respect thereto, a coupling memberat one end of said element for attaching one end of a blade therewith,resilient means between said sleeve and coupling element for normallyurging said element in the direction of said coupling member,cooperating ratchet means at the other end of said element and on saidsleeve, said ratchet means supported in yieldable engagement by saidresilient means, and said ratchet means being supported in positiveengagement when a blade is supported in taut position by firm engagementof the shoulder on said sleeve with said frame.

3. A blade supporting device for a hacksaw frame of the class describedhaving rotatable blade engaging means at one end thereof, said deviceincluding a threaded sleeve adapted to be slidably keyed in the opposedend of the frame, a blade engaging member extending through said sleeve,blade engaging means at one end of said member, enlarged means at theother end of said member adapted to register with corresponding means onthe end of said sleeve in predetermined positions of rotation of saidmember with respect to said sleeve, means disposed between said sleeveand blade engaging member adapted to resiliently urge said sleeve in thedirection of the enlarged means on said member, and adjustable means onsaid sleeve cooperating with said frame for independently urging saidsleeve in the direction of the enlarged end of said member in theope-ration of firmly supporting a blade in said frame.

4. In combination with a hacksaw frame of the character described meansfor detachably and adjustably mounting blades in said frame withoutdetaching said means therefrom, said means comprising a freely rotatablemember in one part of the frame having means for engaging one end of ablade, and a device comprising an externally threaded sleeve slidablyand nonrotatably supported in another part of the frame, a bladecoupling member having means at one end thereof for engaging the otherend of the blade, said blade coupling member being rotatable in saidsleeve and relatively movable longitudinally thereof and of said lastnamed part of the frame, an enlarged portion at the other end of saidcoupling member and cooperating with said sleeve for limiting movementof said sleeve in the direction of said enlarged portion, adjustablemeans on said sleeve and cooperating with said last named part of theframe for moving said sleeve into firm engagement with the enlargedportion of said coupling member and for collectively moving said sleeveand member in the direction of said enlarged end to tighten the blade inthe frame, and means for locking the coupling member against rotationwith respect to the sleeve when the blade is supported in taut position.

5. In a hacksaw frame having rotatable means at one end portion thereoffor engaging one end of a blade, an attachment for the other end por-;tion of said frame providing for rotary adjustment and replacement ofthe blade Without removing the attachment from the frame, saidattachment comprising an elongated threaded sleeve, means for keying thesleeve in said last named portion of the frame against relative rotationwhile permitting longitudinal movement of the sleeve therein, a bladecoupling element rotatable in said sleeve and relatively movablelongitudinally thereof and of said portion of the frame, a couplingmember at one end of said element for engaging the other end of theblade, ratchet means at the other end of said element engagingcorresponding ratchet means on said sleeve to prevent rotation of theelement when the blade is supported in taut position, said ratchet meansforming stop shoulders limiting the relative longitudinal movement ofsaid sleeve and element, movable threaded means on said sleeve forming ashoulder thereon abutting the outer end of said last named portion ofthe frame, and said movable threaded means through said sleeve and stopshoulders controlling the longitudinal movement of said sleeve andelement relative to said part of the frame in the operations oftightening and loosening the blade supported therein.

6. A blade supporting device for conventional hacksaw frames of theclass described, said device comprising a blade coupling element havinga blade coupling member at one end thereof, means at the other end ofsaid element for controlling rotary movement of said element, meansslidably arranged in the frame for supporting the element, an adjustablemember on said last named means and abutting the frame for controllingrelative movement of said means in the frame, said first named meanscomprising a ratchet adapted to engage corresponding ratchet means onsaid element supporting means, and said ratchet also forming a stopshoulder adapted to communicate to said coupling element thelongitudinal movement imparted to said supporting means by saidadjustable member.

CHARLES HUBECK.

